spark TaskLocality 源码
spark TaskLocality 代码
文件路径：/core/src/main/scala/org/apache/spark/scheduler/TaskLocality.scala
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.scheduler
import org.apache.spark.annotation.DeveloperApi
@DeveloperApi
object TaskLocality extends Enumeration {
// Process local is expected to be used ONLY within TaskSetManager for now.
val PROCESS_LOCAL, NODE_LOCAL, NO_PREF, RACK_LOCAL, ANY = Value
type TaskLocality = Value
def isAllowed(constraint: TaskLocality, condition: TaskLocality): Boolean = {
condition <= constraint
}
}
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